Microscopic Studies on Liquid Crystal Poly(3,3‘ ‘‘-dialkylquaterthiophene) Semiconductor

Through tapping mode atomic force microscopy and transmission electron microscopy, we were able to directly visualize the nature of crystal domains of liquid crystalline poly(3,3‘ ‘‘-dialkylquaterthiophene) in its spin-coated films. The size of domains, consisting of large anisotropic lamellar stacks formed by arrays of π−π stacking polymer chains, was highly dependent on annealing temperature covering the range from the crystal-to-liquid …